Impulse-starter



' P. OSTENBERG.

IMPULSE STARTER.

APPLICATION FILED Nov.15,191s.

mmm muy 5B 1921.,

LSSASQ,

and operation. Another object lFi.

UNITED `STATES PAT-ENT OFFICE.

roNrUs osrnmsna 'or Los Gares, cALrFoRN-m.

mrULsii-srmmm Application led November 15, 1918. `Serial No.

. fication.

This invention relates used in conjunction with electric generators, especially of the high tension type, to generate a hot spark upon' the first revolutions 0f the generator.

`One object of this invention `is to provlde a device of the character indicated that will Simple in form, construction, application of the in-` vention is to provide Va device of the character indicated wherein the driven member and driving member themselves provide the stop and tripping elements respectively and wherein a simple and novel means is provided for automatically rendering the said stop inoperative when the members are driven at high speed and automatically re' turned to an operative position when said members slow down to a stop.

With these and other objects inVV view, th

invention consists in the new and novel conf struction, provision, vformation, combination and relative arrangement and` finally pointed out in view of myimproved impulse starter. f

Fig. 2 is Fi 1. l v

ig. 3 is a sectional view on line 3-301 igs. 4-5 and 6 are detail illustrations of a portion of the driven member and the detent of my device provided with a stop and novell means for preventi the detent from 'engaging said stop ywhen t e members are rotated at high i a sectional view on line 2.-2 of j speed. Fig. 7 is a detail i lustration cfa portion l of the driven member of my device provided 'with' a stop and having a novel formof'de- 4tent operatively positioned with relation thereto.

of the driven member of my device provided' with a novel means for preventing a detent Fig. 8 is a detail illustration of a portion Specification of Iietters Patent.

to impulse startersl and an outwardly projecting outer edge'as indicated at 5, the saidiiange 5 having a notch circumference as of parts, members and features as hereinafter described, shown head 18 adapted Patented July 5, 1921.

hi li' speed.

ig. lO-is a detail illustrationof a portion of the driven member of my device provided with a novel means for preventing a detent from engaging; the stop when the member is rotated at hig speed.

F1g. 11 is a vertical transverse sectional iizrie'w of another embodiment of my inven- Fig. 12 is a sectional view on line 'l2- 12 of Fig. 11.

Similar characters of reference indicate similar parts throughout the several views.

c ferring now more particularly to the drawings, l is a portion of a magneto andy 2 is the magneto shaft having driven member 3 fixedly mounted thereon. Member 3 is provided with a sleeve 4 to en age shaft 2 ange on its or stop formed in its outer shown at 6.

At 7 is shown the driving member of substantially the same'proportions as member 3 and Ahaving an inwardl directed sleeve '8 revolubly mounted ons eeve 4, the outer .circumference of member 7 i Y as at 9 toform cam 9 for inafter described. The said member 7 is being cut away the purpose hereheld in position by a nut 10 screwed on to the end of shaft y2. Outwardly projecting ange 5. and inwardl projecting sleeve 8 form a circular cham er l11 provided with a dividing member-'12 set in flange 5 of member 3, A lug l3projects into chamber l1 from the inner surface of member 7 of which itA is a part and `a short buffer spring 14 is positioned and lug 13, and a longer compression spring is inserted in chamber 1I as shown at 15.

Mounted upon magneto 1 by pivot 16 is a detent 17 having an"` inwardly projecting to-engage stop 6 in fiange 5; These parts may be inclosed in a suitable casing as 19.

Iii-operation, when driving member 7 is turned in the direction of the arrow member 3 is held immovable by the engagement between members 12 f without engaging the said stop.

of detent 17 with stop 6. As member 7 revolves lug 13 compresses spring 15 until cam 9 engages head 18 on detent 17 and forces it out of stop 6, the said head 18 being made wide enough to ride upon the outer circumferences of both members 3 and 7. The moment the disengagement of the detent 17 is effected spring 15 relaxes and throws member 3 ,and the parts attached thereto suddenly forward until 'the 'buffer spring 14 contacts with lug 13 whereupon both members 3 and 7 revolve together. The detent is comparatively light and an appreciable length of time is requiredv for the head 18 to fall into engagement with stop 6, therefore when members 3 and 7 are revolving at hi h speed the head 18 rides over stop 6. hen the said members slow down to a stop the head 18 readily falls into engagement with stop 6 and is automatically set into an operative position. The reference 171 in Fig. 3 indicates the position assumed by the detent 17 when cam 9a has reached the position 9b.

In Fig. 4 one shoulder of stop 6 is shown cut away as at 20 so that head 18 of detent 17 may even drop Aslightly as it passes over said stop without engaging the same.

In Fig. 5 the stop 6 is shown cut straight away from its engaging shoulder and thev detent 17 is connected-to a pin 21 in magneto 1 by a light reed 22 fitting into the end thereof. A second light reed 23 is connected to pivot 16 and carries a boss 24 upon its free end which rests lightly against the outer circumference of member 7.l Boss 24 is in constant contact with the periphery of member 7 and exerts a constant but slight tendency to overcome the balancing effect of member 22 and the inertia of the disengaged detent and throw said detent into" engagement with stop 6. The result is that the said detent is caused to engage stop 6 at each revolution of the revolving members until sufficient speed has been acquired by them to maintain the detent in an inoperative position, but when the members again slow down the detent is caused to engage the Stop and this action is positive in whatever position the device may be placed In Fig. 6 a boss 25 is formed upon the circumference of member 3 adjacent stop 6 so that when said member is revolving rapidly thelhead 18 of detent 17 first rides up on boss 25 before passing over stop 6 thereby permitting the said detent to drop slightly Fig. 7 illustrates a chamber 26 formed by a vertical enlargement of casing 19 and containing a detent 27 freely movable therein, the head 18 of said detent operating in conjunction with .stop 6 as hereinbefore described. 1 I

FiggeS shows the stop '12 formed with a cha r 35 formed: therein and tapering outwardly to the circumference of member 3 and intersecting stop 6 and containin a freely movable member 36. When mem er 3 is revolved at high speed member 36 is thrown outwardly to close the circumferential opening of chamber 35 and thereby prevents the engagement of detent 17 with -stop 6.

Fig. 9 shows detent head 18 beveled as at 37 so that said head will easily ride over the stop 6 when member 3 is revolved at high speed. A balancing arm 38 is -also here shown as depending from pivot 16, the same being slightly lighter than detent 17 and head 18 so 'as to render said detent 17 more delicate in operation.

Fig. 10 shows a portion of the circumferential surface of member 3 cut away as at 39 to form a rise 40 suicient to cause detent 17 to clear stop 6 when said member 3 is rotating at high speed.

Figs. 11 and 1,2 illustrate another embodiment of my device in which a sprin 28 is connected directly to members 3 an 7, a lug 29 being fixed in memberl3 and a in 30 in member 7 normally in engagement with each other but separated during the forward movement of member 7 and before the disengagement of detent 17 from stop 6. In this embodiment a freely swinging arm 31 is pivoted at 32 in chamber'l 11 and provided with an outwardly extending head 33 adapted to move into and fill slot 34 formed in flange 5 of member-3 and intersectin stop 6. When member 3 is revolved at hig speed the centrifugal force throws head 33 outwardly into slot 34 and lls the same so that the detent cannot engage stop 6. When the rotating member 3 slows down to a sto the arm 31 falls inwardly by its own weig t thereby permitting detent 17 to engage stop 6. The reference 17b in Fig. l12 indicates the position assumed by the detent 17 when members 3 and 7 are revolving and member 31 is thrown .into the position 31,

It is known that certain devices have been provision of some means coperating with the circumferential surface ofmembers 3 or its 7 or both of them whereby the detent is pre-v vented from engagin members are revolve permit said detent to automatical y engage the stop when saidmembers slow down to a stop 6y vwhen said fi; is pointed out that when a square shoulat fair s eed, but p dered stop 6 is used as shown in Fig. 2 it is made but slightly Wider in cross-section than the head 18 of detent 17, said Width being just suihcient to prevent the action of gravity from pulling the said head into the stop when the member 3 is rotated at high speed. The proportional widths of stop 6 and head 18 would be, in this case, the means .that cooperates with the periphery of member 3 for the purpose stated.

In Fig. 5 t-he parts connected to detent 17 and the periphery of member 7 against which lug 24 operates constitute the means which cooperate with the periphery of member 3 for the purpose set forth.

It is understood of course that I do not Wish to conne myself to the specific forms herein set forth but to include all variations that may be made within the scope of the appended claims.

1. A11 impulse starter for electric generators including a driven member having a stop thereon, a driving member yieldingly connected to said driven member, a detent mounted externally of and independently of said members and adapted to automatically engage said stop when said members are .fixed my l slowly revolved, means operated by said driving member for rendering said detent inoperative, means operated by the peripheral movement of said driven member for maintaining said detent in an inoperative position, and means operatively mounted with relation to said detent to substantially counterbalance the same.

2. An impulse starter for electric generators including a driven member having a stop thereon, a driving member yieldingly connected to said driven member, a detent pivot-ally mounted externally of and independently of said members and adapted to automatically engage said stop when said members are slowly revolved, means operated by said driving member for rendering said detent inoperative, means operated by the peripheral movement of said driven member for maintaining said detent in an inoperative position, and an arm depending from the pivotal end of said detent for substantially counterbalancing the same.

In testimonyv whereof I have hereunto afsignature this 7th day of November, 1918.

PON TUS OSTENBERG. 

